log4j:WARN No appenders could be found for logger (running jar file, not web app) [duplicate]

Answer 1

Solution

1. Download log4j.jar file
2. Add the log4j.jar file to build path

3. Call logger by:

   private static org.apache.log4j.Logger log 
       = Logger.getLogger(.class);
   

4. if log4j properties does not exist, create new file log4j.properties file new file in bin directory:

   /workspace/projectdirectory/bin/
   

Sample log4j.properties file

log4j.rootLogger=debug, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%t %-5p %c{2} - %m%n